Expandable Container House Frame Welding & Painting Process | Factory Production
The steel frame is the core structural part of every expandable container house, it determines the strength, stability, and long-term durability of the house. Each frame is constructed from 2.5mm-thick galvanized steel tube, taking a 20ft expandable container as an example, a single frame weighs as much as 1,200 kg.​
To ensure the stability of each frame, we first use a laser tube cutting machine to precisely cut the steel tube, after which welders assemble the galvanized steel structure to guarantee robust load-bearing capacity.​
Once welding is complete, every seam and joint in the frame is carefully ground and polished to remove weld spatter and ensure a smooth surface. This polishing process serves as preparation for the subsequent coating.​​
The completed frames then proceed to the anti-corrosion spraying process. First, workers wear protective gear and use a spray gun to apply the powder evenly to the frame. The frame is then transferred to a large oven for high-temperature curing for approximately two hours, ensuring the powder adheres firmly to the frame. The powder-coated steel structure is thus protected against moisture, rust in various outdoor environments. This process significantly extends the house span life.​
Through strict welding standards, meticulous surface finishing and durable protective coatings, our factory ensures that every expandable container house frame meets the requirements of global housing projects for high structural quality and long-term reliability.
Frame Welding & Painting Quick View
